CN110896546A - Beam failure recovery method and device, storage medium and user equipment - Google Patents
Beam failure recovery method and device, storage medium and user equipment Download PDFInfo
- Publication number
- CN110896546A CN110896546A CN201811070259.8A CN201811070259A CN110896546A CN 110896546 A CN110896546 A CN 110896546A CN 201811070259 A CN201811070259 A CN 201811070259A CN 110896546 A CN110896546 A CN 110896546A
- Authority
- CN
- China
- Prior art keywords
- beam failure
- reference signal
- failure recovery
- trp
- panel mode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000011084 recovery Methods 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims abstract description 66
- 238000012544 monitoring process Methods 0.000 claims abstract description 36
- 230000011664 signaling Effects 0.000 claims description 20
- 238000005259 measurement Methods 0.000 claims description 9
- 230000001960 triggered effect Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 3
- 244000046052 Phaseolus vulgaris Species 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- 230000009849 deactivation Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 101100533725 Mus musculus Smr3a gene Proteins 0.000 description 1
- 102100035593 POU domain, class 2, transcription factor 1 Human genes 0.000 description 1
- 101710084414 POU domain, class 2, transcription factor 1 Proteins 0.000 description 1
- 102100035591 POU domain, class 2, transcription factor 2 Human genes 0.000 description 1
- 101710084411 POU domain, class 2, transcription factor 2 Proteins 0.000 description 1
- 101150069124 RAN1 gene Proteins 0.000 description 1
- 101150014328 RAN2 gene Proteins 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A beam failure recovery method and device, a storage medium and user equipment are provided, wherein the beam failure recovery method comprises the following steps: receiving a reference signal set which is configured by a base station and used for monitoring beam failure, wherein the reference signal set used for monitoring beam failure comprises at least one reference signal; measuring the signal quality of each reference signal, and calculating to obtain an estimated block error rate (a lower-order block error rate) of each reference signal according to the signal quality of each reference signal; and if the mobile terminal is in a Multi-TRP/Multi-Panel mode and at least one reference signal in the reference signal set for monitoring the beam failure has beam failure, triggering a beam failure recovery process. The technical scheme of the invention can realize the recovery of beam failure in a Multi-TRP/Multi-Panel scene and ensure the communication efficiency between the user equipment and the base station.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for recovering a beam failure, a storage medium, and a user equipment.
Background
In the previous Radio Access Network (RAN 1) protocol (acquisition), it is explicitly stated that Beam Failure Recovery (BFR) based on Physical Uplink Control Channel (PUCCH) and Random Access Channel (RACH) is to be supported. The BFR of RACH-like is standardized in Standard 15(Release, R15). RACH-like BFR of R15 supports both Contention-Based CFR (CB-BFR) and Contention-Free CFR (Contention-Free BFR, CF-BFR). For CB-BFR, the current mainstream understanding of RAN2 is that RACH flows inside the initial connection (initial access) can be multiplexed without a separate design.
In the prior art, R15 supports a UE with a single serving beam. The base station configures a Reference Signal (CSI-RS resource) used for a beam failure to monitor through a Radio Resource Control (RRC) signaling configuration period, where the Reference Signal set is the set q 0. The base station also configures a rule of a predictive (posterior) PDCCH Block error rate (BLER) and a threshold Q1 for the User Equipment (UE). If the quality of the radio links corresponding to all the RS resources in the set Q0 is higher than Q1, that is, all the service beams fail at this time, the physical layer sends indication information to the higher layer, and the higher layer counts the number of failures. And if the count of the high layer reaches the preset maximum value, triggering the BFR process.
However, currently, R15 supports at most 2 reference signals in a set q0, and assuming that the UE configured set q0 includes 2 RSs, it can theoretically support a Multi-transmit point/Multi-antenna array (Multi-TRP/Multi-Panel) scenario to the minimum, that is, one RS corresponds to one TRP/Panel. However, if the predicted block error rate of one RS in the SET Q0 is higher than the threshold Q1, in this case, the base station does not know the beam condition at this time, and if the base station performs continuous Multi-TRP/Multi-Panel mode scheduling, decoding fails on one Control Resource SET (CORESET).
Disclosure of Invention
The technical problem to be solved by the invention is how to realize the beam failure recovery in a Multi-TRP/Multi-Panel scene and ensure the communication efficiency between the user equipment and the base station. Under the Multi-TRP/Multi-Panel mode, a plurality of TRPs or Panel can be used for downlink transmission for the same UE.
In order to solve the above technical problem, an embodiment of the present invention provides a beam failure recovery method, where the beam failure recovery method includes: receiving a reference signal set for failure in beam listening configured by a base station, wherein the reference signal set for failure in beam listening comprises at least one reference signal; measuring the signal quality of each reference signal, and calculating to obtain the estimated block error rate of each reference signal according to the signal quality of each reference signal; and if the mobile terminal is in a Multi-TRP/Multi-Panel mode and at least one reference signal in the reference signal set for monitoring the beam failure has beam failure, triggering a beam failure recovery process, wherein the reference signal beam failure means that the count of the estimated block error rate of the reference signal higher than a preset threshold reaches a preset maximum value, and the preset maximum value is configured in advance by the base station.
Optionally, the reference signal set for monitoring beam failure includes two reference signals, and the trigger beam failure recovery procedure includes: and if the mobile terminal is in a Multi-TRP/Multi-Panel mode and any one of the reference signals in the reference signal set for monitoring the beam failure has the beam failure, triggering a beam failure recovery process.
Optionally, the trigger beam failure recovery procedure includes: if the mobile terminal is in a Multi-TRP/Multi-Panel mode and all reference signals in the reference signal set for monitoring the beam failure have beam failure, directly triggering a beam failure recovery process, and otherwise reporting a beam report to a base station, wherein the beam report at least comprises the identifier of the reference signal with the beam failure.
Optionally, the beam report further includes one or more of the following: the cell identification corresponding to the reference signal with the beam failure, the signal quality of the reference signal with the beam failure, the identification of the optimal beam and the signal quality of the optimal beam.
Optionally, the reference signal set for monitoring beam failure includes three or four reference signals, and the trigger beam failure recovery procedure includes: and if the mobile terminal is in a Multi-TRP/Multi-Panel mode and at least M reference signals in the reference signal set for monitoring the beam failure have beam failure, triggering a beam failure recovery process, wherein M is a positive integer greater than or equal to 2.
Optionally, the reference signal set for the listening beam failure includes a first subset and a second subset, where the first subset or the second subset includes at most two reference signals, and the trigger beam failure recovery procedure includes: and if the mobile terminal is in a Multi-TRP/Multi-Panel mode and all reference signals in the first subset and/or the second subset have beam failures, directly triggering a beam failure recovery process, wherein the first subset and the second subset respectively correspond to TRP or Panel.
Optionally, if the ue is in Multi-TRP/Multi-Panel mode and at least one reference signal in the reference signal set for monitoring the beam failure has a beam failure, the triggering the beam failure recovery process includes: respectively adopting a beam failure frequency counter corresponding to each reference signal to count the frequency of the estimated block error rate of each reference signal higher than a preset threshold value; and if the count of the beam failure frequency counter corresponding to at least one reference signal reaches the corresponding preset maximum value, triggering a beam failure recovery process.
Optionally, the beam failure recovery method further includes: in performing contention-based beam failure recovery, the identity of the reference signal where the beam failure occurred is indicated by a control element of the MAC layer in message 3.
Optionally, the beam failure recovery method further includes: when performing contention-based beam failure recovery or contention-free beam failure recovery, the identity of the reference signal for which the beam failure occurred is indicated by the PRACH resource in the message1, and the identity of the reference signal corresponds to the PRACH resource.
Optionally, the beam failure recovery method further includes: when performing contention-based beam failure recovery or contention-free beam failure recovery, indicating PRACH resources corresponding to candidate reference signals by a message1, where signal quality of the candidate reference signals is greater than a preset threshold.
Optionally, whether the Multi-TRP/Multi-Panel mode is set is judged by one of the following modes: determining to be in a Multi-TRP/Multi-Panel mode if a plurality of demodulation reference signal groups configured by the base station are received; determining whether to enter a Multi-TRP/Multi-Panel mode or not through indication information in a PDCCH or indication information in RRC signaling; determining, by a control element of a MAC layer, whether a Multi-TRP/Multi-Panel mode is activated; determining whether the mobile terminal is in a Multi-TRP/Multi-Panel mode through the configured measurement resource configuration for the listening beam failure or the reporting configuration for the listening beam failure; judging whether a PDCCH scrambled by a wireless network temporary identifier aiming at a Multi-TRP/Multi-Panel mode is received or not to determine whether the PDCCH is in the Multi-TRP/Multi-Panel mode or not; determining whether the downlink control information is in a Multi-TRP/Multi-Panel mode or not according to the format of the received downlink control information and the corresponding relation between each format and the Multi-TRP/Multi-Panel mode; and determining the sum of the number of layers of the scheduled code words in the received downlink control information, and determining to be in a Multi-TRP/Multi-Panel mode when the sum of the number of layers is less than or equal to 4.
In order to solve the above technical problem, an embodiment of the present invention further discloses a beam failure recovery apparatus, where the beam failure recovery apparatus includes: a reference signal set receiving module, adapted to receive a reference signal set configured by a base station for a listening beam failure, where the reference signal set for the listening beam failure includes at least one reference signal; the signal quality measurement module is suitable for measuring the signal quality of each reference signal and calculating to obtain the estimated block error rate of each reference signal according to the signal quality of each reference signal; the beam failure recovery triggering module is adapted to trigger a beam failure recovery process when a beam failure occurs in at least one reference signal in the reference signal set for monitoring the beam failure in a Multi-TRP/Multi-Panel mode, where the beam failure occurs in the reference signal refers to a count that an estimated block error rate of the reference signal is higher than a preset threshold and reaches a preset maximum value, and the preset maximum value is pre-configured by the base station.
The embodiment of the invention also discloses a storage medium, wherein a computer instruction is stored on the storage medium, and the steps of the beam failure recovery method are executed when the computer instruction runs.
The embodiment of the invention also discloses user equipment which comprises a memory and a processor, wherein the memory is stored with a computer instruction which can be operated on the processor, and the processor executes the steps of the beam failure recovery method when operating the computer instruction.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the technical scheme of the invention comprises the steps of receiving a reference signal set which is configured by a base station and used for monitoring beam failure, wherein the reference signal set used for monitoring beam failure comprises at least one reference signal; and if the mobile terminal is in a Multi-TRP/Multi-Panel mode and at least one reference signal in the reference signal set for monitoring the beam failure has beam failure, triggering a beam failure recovery process, wherein the preset maximum value is pre-configured by the base station. In order to avoid the decoding failure condition caused by the fact that the base station does not know the beam state under the Multi-TRP/Multi-Panel mode, in the technical scheme of the invention, when the count of the estimated block error rate of one or more reference signals which is higher than the preset threshold reaches the preset maximum value, the user equipment can trigger the beam failure recovery process, so that the base station configures a better beam for serving the user equipment, and the communication efficiency between the user equipment and the base station is ensured. In addition, the reference signal set for failure to listen to a beam may include more than two reference signals, the reference signals corresponding to the beam to meet the user's requirements in Multi-TRP/Multi-Panel mode.
Further, the set of reference signals for listening beam failure includes a first subset and a second subset, and the first subset or the second subset includes at most two reference signals, and the trigger beam failure recovery procedure includes: and if the mobile terminal is in a Multi-TRP/Multi-Panel mode and the reference signals in the first subset and/or the second subset have beam failure, directly triggering a beam failure recovery process, wherein the first subset and the second subset respectively correspond to TRP or Panel. In the technical scheme of the invention, the first subset and the second subset are configured, and the first subset and the second subset correspond to the TRP or the Panel respectively, so that 2 TRPs or Panels in a Multi-TRP/Multi-Panel mode have independent reference signal sets, thereby being beneficial to a base station to independently recover the reference signals in the subsets and further ensuring the communication efficiency.
Drawings
Fig. 1 is a flowchart of a beam failure recovery method according to an embodiment of the present invention;
fig. 2 is a flowchart of a specific implementation of a beam failure recovery method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a beam failure recovery apparatus according to an embodiment of the present invention.
Detailed Description
As described in the background, currently, R15 supports at most 2 reference signals in a set q0, and assuming that a set q0 configured by a UE includes 2 RSs, a Multi-transmit point/Multi-antenna array (Multi-TRP/Multi-Panel) scenario can be supported at the minimum theoretically, that is, one RS corresponds to one TRP/Panel. However, if the predicted block error rate of one RS in the set Q0 is higher than the threshold Q1, in this case, the base station does not know the beam condition at that time, and if the base station performs continuous Multi-TRP/Multi-Panel mode scheduling, decoding fails on one Control resource set (CORESET).
In order to avoid the decoding failure condition caused by the fact that the base station does not know the beam state under the Multi-TRP/Multi-Panel mode, in the technical scheme of the invention, when the count of the estimated block error rate of one or more reference signals which is higher than the preset threshold reaches the preset maximum value, the user equipment can trigger the beam failure recovery process, so that the base station configures a better beam for serving the user equipment, and the communication efficiency between the user equipment and the base station is ensured. In addition, the reference signal set for failure to listen to a beam may include more than two reference signals, the reference signals corresponding to the beam to meet the user's requirements in Multi-TRP/Multi-Panel mode.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a flowchart of a beam failure recovery method according to an embodiment of the present invention.
The beam failure recovery method can be used for the user equipment side. I.e. the user equipment may perform the various steps shown in fig. 1.
The beam failure recovery method shown in fig. 1 may include the steps of:
step S101: receiving a reference signal set for a listening beam failure configured by a base station, wherein the reference signal set for the listening beam failure comprises at least one reference signal. Wherein, the reference signal can be SSB, SRS, CSI-RS or TRS;
step S102: measuring the signal quality of each reference signal, and calculating to obtain an estimated block error rate (a lower-order block error rate) of each reference signal according to the signal quality of each reference signal;
step S103: and if the mobile terminal is in a Multi-TRP/Multi-Panel mode and at least one reference signal in the reference signal set for monitoring the beam failure has beam failure, triggering a beam failure recovery process, wherein the preset maximum value is configured by the base station.
In a specific implementation, the base station may configure, for the UE, a reference signal set for beam listening failure for the beam listening failure, so that the UE obtains a signal quality condition of a corresponding beam (beam) according to a measurement of a reference signal in the reference signal set for beam listening failure. Specifically, the reference signal in the reference signal set may be a type of the reference signal, or may be an index (index) of the reference signal.
In particular, the base station may configure two reference signals in a set of reference signals for listening beam failure. Three or four reference signals may also be configured in the reference signal set for listening beam failure.
It is to be understood that the number of reference signals may be any other practicable number, and the embodiment of the present invention is not limited thereto.
In a specific implementation of step S102, the UE may measure the signal quality of each reference signal to obtain the signal condition of the beam corresponding to the reference signal. Specifically, the estimated block error rate may be calculated according to the signal quality of each reference signal, and the estimated block error rate corresponding to the reference signal may represent the signal quality of the beam corresponding to the reference signal.
It should be noted that, for the specific implementation of the UE calculating the estimated block error rate according to the signal quality of the reference signal, reference may be made to the existing standard protocol, and the embodiments of the present invention are not described herein again.
The user equipment may know whether it is in Multi-TRP/Multi-Panel mode. The UE being in Multi-TRP/Multi-Panel mode means that the UE has multiple serving beams (or multiple CORESET or multiple PDCCH). The PRACH resources corresponding to multiple TRPs/panels in the Multi-TRP/Multi-Panel mode may be independent or the same. For example, different TRPs/panels correspond to different sets of PRACH resources, the 1 st TRP/Panel corresponds to set 1 of PRACH resources, the 2 nd TRP/Panel corresponds to set 2 of PRACH resources, and so on. In addition, different TRP/Panel sequences can be distinguished by using different preamble sequences. For example, the 1 st TRP/Panel corresponds to preamble sequence set 1, the 2 nd TRP/Panel corresponds to preamble sequence set 2, and so on. The base station can distinguish which RS in a set for monitoring beam failure triggers BFR through the received PRACH resource or PRACH sequence; or the base station can distinguish which specific set for monitoring beam failure triggers BFR through the received PRACH resource or PRACH sequence
Further, in step S103, if a beam failure (beam failure) occurs in at least one reference signal when the UE is in the Multi-TRP/Multi-Panel mode, a beam failure recovery procedure is triggered. That is to say, when the count of the estimated block error rate of a single reference signal in the reference signal set for monitoring beam failure, which is higher than the preset threshold, reaches the preset maximum value, that is, when 1 beam failure condition (beam failure event) is defined, that is, the estimated block error rate of the RS is higher than the preset threshold, the MAC layer performs COUNTER counting of the beam failure event, where the count is denoted as BFI-COUNTER, and when the BFI-COUNTER of the single reference signal reaches the preset maximum value, the UE may trigger a beam failure recovery procedure; when the number of estimated block error rates of a plurality of or all reference signals in the reference signal set for monitoring the beam failure is higher than the preset threshold reaches the preset maximum value, the UE may also trigger the beam failure recovery procedure.
Specifically, the base station may configure a preset threshold and a preset maximum for the UE when configuring a reference signal set for a beam listening failure. For example, the base station may configure the preset maximum value through higher layer signaling (e.g., RRC signaling).
Specifically, the beam failure recovery procedure may include the following procedures: beam failure detection (Beam failure detection); candidate beam authentication (Candidate beam authentication); for a Beam failure recovery request (Beam failure recovery request) and a Beam failure feedback (Beam failure response), reference may be made to R15 for a specific embodiment, which is not described herein again.
In the embodiment of the invention, when the UE is in a Multi-TRP/Multi-Panel mode, if the count that the estimated block error rate of only one reference signal is higher than the preset threshold reaches the preset maximum value, the UE can trigger BFR.
In a preferred embodiment of the present invention, the reference signal set for the listening beam failure may include two, three, or four reference signals. Step S103 shown in fig. 1 may include the following steps: if the mobile terminal is in a Multi-TRP/Multi-Panel mode and any one of the reference signals in the reference signal set for monitoring the beam failure has a beam failure, triggering a beam failure recovery process
In this embodiment, the UE may trigger the beam failure recovery procedure when the count of the estimated block error rate of the single reference signal, which is higher than the preset threshold, reaches the configured maximum count value (i.e., the preset maximum value). Wherein the maximum count value may be configured by higher layer signaling.
In another preferred embodiment of the present invention, step S103 shown in fig. 1 may include the following steps:
if the mobile terminal is in a Multi-TRP/Multi-Panel mode and all reference signals in the reference signal set for monitoring the beam failure have beam failure, directly triggering a beam failure recovery process, and otherwise reporting a beam report to a base station, wherein the beam report at least comprises the identifier of the reference signal with the beam failure.
In this embodiment, when the reference signal set for monitoring the beam failure includes two reference signals, and when the count of the estimated block error rate of a single reference signal higher than the preset threshold reaches the preset maximum value, that is, when 1 beam failure condition (beam failure instance) is defined that the estimated block error rate of the RS is higher than the preset threshold, the MAC layer performs COUNTER counting of the beam failure instance, where the count is denoted as BFI-COUNTER, and when the BFI-COUNTER of the single reference signal reaches the preset maximum value, the UE may report a beam report (beam report or partial beam failure report) to notify the base station of the identifier of the single reference signal. The identity of the reference signal with the beam failure is an indication to the base station which reference signal has an estimated block error rate higher than a preset threshold. Under the condition that the two reference signals have beam failure, namely under the condition that the BFI-COUNTER of the two reference signals reach the preset maximum value, the UE can directly trigger the BFR process.
When the reference signal set for failure in monitoring the beam includes three reference signals, the UE may report a beam report to notify the base station of the identifier of the single reference signal or the two reference signals when the count of the estimated block error rate of the single reference signal or the two reference signals higher than the preset threshold reaches the preset maximum value. When the reference signal set for failure in monitoring the beam includes four reference signals, the UE may report a beam report to notify the base station of the identifier of the single, two, or three reference signals when the count of the estimated block error rate of the single, two, or three reference signals being higher than the preset threshold reaches the preset maximum value.
In a specific implementation, the beam report may be carried by Uplink Control Information (UCI), or may be carried by a Control Element (CE) of the MAC layer. That is, the UCI and the MAC-CE may carry at least an identification of the reference signal. The identification of the reference signal may occupy one bit or two bits. Wherein, when one bit is used for indicating, 0 represents a first RS in the reference signal set for monitoring the beam failure, and 1 represents a second RS in the reference signal set for monitoring the beam failure; or one bit indicates 1 for a first RS in the reference signal set for the listening beam failure and 0 for a second RS in the reference signal set for the listening beam failure. As another example, when two bits are used for indication, it can be distinguished which RS triggered the beam failure and which two RSs triggered the beam failure at the same time. For example, 00 denotes the first RS in the reference signal set for listening beam failure, 01 denotes the first RS in the reference signal set for listening beam failure, 10 denotes two RSs in the reference signal set for listening beam failure, 11 is reserved. The UCI or MAC-CE used for reporting the beam report can be reported to the base station in the form of Msg.3. Wherein, UCI may be carried on (piggyback) PUSCH or carried through PUCCH.
The PUCCH for reporting the beam report may be configured by the base station through RRC signaling. Or after the PUCCH for reporting the beam report is configured by the base station through RRC signaling, the specific resource location of the PUCCH is indicated through the PDCCH.
Further, the beam report further includes one or more of: the cell identifier corresponding to the Reference Signal with beam failure, the Reference Signal Received Power (RSRP) of the Reference Signal with beam failure, the Reference Signal Received Power (RSRQ) of the Reference Signal with beam failure, the Signal to interference plus noise ratio (SINR) of the Reference Signal with beam failure, the identifier of the optimal beam, the RSRP, the RSRQ, or the SINR of the optimal beam.
In specific implementation, if a beam failure occurs in a secondary cell (Scell), a cell identifier corresponding to the reference signal where the beam failure occurs and/or a BWP sequence number corresponding to the reference signal where the beam failure occurs may be reported by UCI or MAC-CE of a Primary cell (PrimaryCell, PCell) or a Primary and secondary cell (Primary Scell, PScell).
If the beam failure occurs in a Primary Cell (PCell) or a Primary secondary Cell (PScell), the Cell identity corresponding to the reference signal where the beam failure occurs and/or the BWP sequence number corresponding to the reference signal where the beam failure occurs may be reported by UCI or MAC-CE of the secondary Cell. Wherein, the UCI or the MAC-CE may use 1bit to distinguish whether the beam failure report corresponds to the PCell or the primary and secondary cells or the secondary cell. For example, 1 indicates that the beam failure report corresponds to a Primary Cell (PCell) or a Primary and secondary Cell, and 0 indicates that the beam failure report corresponds to a secondary Cell; or 0 indicates that the beam failure report corresponds to the PCell or the primary and secondary cells, and 1 indicates that the beam failure report corresponds to the secondary cell. In addition, the UCI or the MAC-CE may directly carry the cell identifier of the primary cell or the primary and secondary cells and/or the BWP sequence number corresponding to the reference signal with the beam failure.
In another preferred embodiment of the present invention, the reference signal set for failure in listening to a beam includes three or four reference signals, and step S103 shown in fig. 1 may include the following steps:
and if the mobile terminal is in a Multi-TRP/Multi-Panel mode and at least M reference signals in the reference signal set for monitoring the beam failure have beam failure, triggering a beam failure recovery process, wherein M is a positive integer greater than or equal to 2.
In this embodiment, when the reference signal set for beam monitoring failure includes three or four reference signals, in order to avoid repeated beam failure recovery, the base station may configure a value of M, where M may be 2, 3, or 4; the UE may trigger the beam failure recovery procedure when at least M reference signals in the reference signal set for monitoring the beam failure have a beam failure.
In still another preferred embodiment of the present invention, the reference signal set for failure of listening to a beam includes a first subset and a second subset, and the first subset or the second subset includes at most two reference signals, and step S103 shown in fig. 1 may include the following steps: and if the Multi-TRP/Multi-Panel mode is adopted and the beam failure occurs to all the reference signals in the first subset and/or the second subset, directly triggering the beam failure recovery process. Wherein the first and second subsets may correspond to TRPs or Panel, respectively.
In particular, the first subset q0 and the second subset q0-bis may be a combination of: q0 ═ { RS-1, RS-2} and q0-bis ═ { RS-3, RS-4 }; q 0-RS-1 and q 0-bis-RS-2, RS-3; or q0 ═ { RS-1, RS-2} and q0-bis ═ RS-3 }. Wherein the first subset q0 and the second subset q0-bis may correspond to one TRP/Panel, respectively.
Any one of the first subset q0 and the second subset q0-bis satisfies the triggering condition of the BFR, that is, all reference signals fail to generate beams, and the BFR process is triggered.
If the beam failure occurs in both the first subset q0 and the second subset q0-bis, the base station may perform the BFR procedure of the set q0 pair first and then perform the BFR procedure corresponding to the set q0-bis when performing the beam failure recovery; or the BFR process corresponding to the second subset q0-bis is carried out first, and then the BFR process corresponding to the first subset q0 is carried out; or sequentially carrying out BFR processes corresponding to the first subset q0 and the second subset q0-bis according to the sequence of triggering BFR.
Further, the UE can recover only 1 beam through BFR, and the base station does not know the specific beam that needs to be recovered, so the base station may stop transmission of the Multi-TRP/Multi-Panel mode after receiving the information that the UE triggers the BFR procedure, and send a Random Access Response (RAR) to the UE only with the currently received new beam.
Furthermore, if the UE triggers a BFR under Multi-TRP/Multi-Panel, the UE may continue to blindly detect the PDCCH on the CORESET that does not trigger the BFR, or the UE must stop blindly detecting the PDCCH on all CORESETs used for Multi-TRP/Multi-Panel transmission at the same time.
Alternatively, the UE may use the core set that does not trigger the BFR as the core set-BFR to receive BFR response (response) information of the base station.
In one embodiment of the present invention, step S103 shown in fig. 1 may include the following steps:
respectively adopting a beam failure frequency counter corresponding to each reference signal to count the frequency of the estimated block error rate of each reference signal higher than a preset threshold value;
and if the count of the beam failure frequency counter corresponding to at least one reference signal reaches the corresponding preset maximum value, triggering a beam failure recovery process.
In a specific implementation, each reference signal corresponds to a beam failure frequency COUNTER BFI-COUNTER. And when the estimated block error rate of the reference signal is higher than a preset threshold value, the count of a beam failure frequency COUNTER BFI-COUNTER corresponding to the reference signal is increased by one. In addition, the base station can also configure a corresponding preset maximum value max-BFI for each reference signal or the base station can also configure a preset maximum value max-BFI for all reference signals through high-level signaling. And then triggering the beam failure recovery process when the count of the beam failure frequency COUNTER BFI-COUNTER corresponding to the reference signal reaches the preset maximum value max-BFI corresponding to the reference signal. The preset maximum values max-BFI corresponding to different reference signals may be the same or different.
In addition, the base station may also configure a beam Failure Detection Timer (beam Failure Detection Timer) for each reference signal through high-layer signaling, or the base station may also configure a beam Failure Detection Timer (beam Failure Detection Timer) for all reference signals through high-layer signaling. If the MAC layer receives a BFI indication (beam Failure indication) from the physical layer (or lower layer), the MAC entity (MAC entry) should start or restart the beam Failure Detection Timer, and the BFI-COUNTER count is incremented by one. If the beam Failure Detection Timer expires (expire), the BFI _ COUNTER is set to 0.
In addition, the base station may also configure a beam Failure Recovery Timer (beam Failure Recovery Timer) for each reference signal through high-layer signaling, or the base station may also configure a beam Failure Recovery Timer (beam Failure Recovery Timer) for all reference signals through high-layer signaling. A beam Failure Recovery Timer is started when BFI _ COUNTER exceeds a preset maximum max-BFI. After the beam Failure Recovery Timer (beam Failure Recovery Timer) times out (expire), the UE can only perform the BFR procedure based on the content based RACH.
For example, when the reference signal set for listening for beam failure includes reference signal RS1 and reference signal RS2, reference signal RS1 and reference signal RS2 respectively correspond to beam failure number COUNTER BFI-COUNTER1 and beam failure number COUNTER BFI-COUNTER 2; the reference signal RS1 and the reference signal RS2 correspond to a preset maximum value max-BFI1 and a preset maximum value max-BFI2 respectively or the reference signal RS1 and the reference signal RS2 correspond to a preset maximum value max-BFI; the reference signal RS1 and the reference signal RS2 correspond to the beamf ailuredetectiontimer1 and the beamf ailuredetectiontimer2, respectively, or the reference signal RS1 and the reference signal RS2 correspond to a beamf Failure Detection Timer; the reference signals RS1 and RS2 correspond to the beam Failure Recovery Timer1 and the beam Failure Recovery Timer2, respectively, or the reference signals RS1 and RS2 correspond to one beam Failure Recovery Timer.
In another embodiment of the present invention, step S103 shown in fig. 1 may include the following steps:
the set of reference signals for failure to listen to a beam includes a first subset and a second subset, and the first subset or the second subset includes at most two reference signals.
Counting the times that the estimated block error rates of all reference signals in the first subset and the second subset are higher than a preset threshold value by respectively adopting beam failure times counters corresponding to the first subset and the second subset;
and triggering the beam failure recovery process when the count of the beam failure frequency counter corresponding to the first subset or the second subset reaches the corresponding preset maximum value.
In specific implementation, the first subset and the second subset respectively correspond to a beam failure frequency COUNTER BFI-COUNTER. And when the estimated block error rate of all the reference signals in the subset is higher than a preset threshold value, the count of a beam failure frequency COUNTER BFI-COUNTER corresponding to the reference signals is increased by one. In addition, the base station may also configure a corresponding preset maximum value max-BFI for each of the first subset and the second subset, or the base station may also configure a corresponding preset maximum value max-BFI for each of the first subset and the second subset. And triggering a beam failure recovery process when the count of the beam failure frequency COUNTER BFI-COUNTER corresponding to the first subset and/or the second subset reaches a preset maximum value max-BFI corresponding to the reference signal. The preset maximum values max-BFI corresponding to the first subset and the second subset may be the same or different.
In addition, the base station may also configure a beam Failure Detection Timer (beam Failure Detection Timer) for each of the first subset and the second subset through high layer signaling, or the base station may also configure a beam Failure Detection Timer for each of the first subset and the second subset through high layer signaling. If the MAC layer receives a BFI indication (beam Failure indication) from the physical layer (or lower layer), the MAC entity (MAC entity) should start or restart the beam Failure Detection Timer, and the BFI-COUNTER count is incremented by one. If the beam Failure Detection Timer expires (expire), the BFI _ COUNTER is set to 0. The beam failure detection timers corresponding to the first subset and the second subset may be the same or different.
In addition, the base station may also configure a beam Failure Recovery Timer (beam Failure Recovery Timer) for each of the first subset and the second subset through high layer signaling, or the base station may also configure a beam Failure Recovery Timer for each of the first subset and the second subset through high layer signaling. A beam failure recovery timer is started when BFI _ COUNTER exceeds a preset maximum max-BFI. When the beam failure recovery timer expires (expire), the UE can only perform the content based RACH BFR procedure.
For example, the reference signal sets for monitoring beam failure are denoted as S1 and S2, S1 and S2 respectively correspond to the beam failure number COUNTER BFI-COUNTER1 and the beam failure number COUNTER BFI-COUNTER2, or S1 and S2 together correspond to a beam failure number COUNTER BFI-COUNTER; s1 and S2 respectively correspond to a preset maximum value max-BFI1 and a preset maximum value max-BFI2 or S1 and S2 jointly correspond to a preset maximum value max-BFI; s1 and S2 correspond to the beamFailureDetectionTimer1 and beamFailureDetectionTimer2 respectively or S1 and S2 correspond to a beamFailure Detection Timer together; s1 and S2 correspond to the bean Failure Recovery Timer1 and the bean Failure Recovery Timer2 respectively or S1 and S2 correspond to a bean Failure Recovery Timer together.
In another embodiment of the present invention, the method for recovering the beam failure shown in fig. 1 may further include the steps of: in performing contention-based beam failure recovery, the identity of the reference signal where the beam failure occurred is indicated by a control element of the MAC layer in message 3.
The beam failure recovery procedure may include a Contention-Based CFR (CB-BFR) and a Contention-Free CFR (CF-BFR)
The CB-BFR can utilize the message1, the message 2, the message3 and the message 4 to complete the beam failure recovery; the CF-BFR may complete beam failure recovery using message1 and message 2.
In this embodiment, in order to indicate the reference signal with the beam failure to the base station, the UE may use a control element of the MAC layer in Message 3(Message3, Msg3) to carry an identifier of the reference signal with the beam failure to the base station in the beam failure recovery process.
Optionally, the beam failure recovery method shown in fig. 1 may further include the steps of: when performing contention-based beam failure recovery or contention-free beam failure recovery, the identity of the reference signal for which the beam failure occurred is indicated by the PRACH resource in the message1, and the identity of the reference signal corresponds to the PRACH resource.
In this embodiment, in the contention-based beam failure recovery or contention-free beam failure recovery process, the UE transmits the preamble using the PRACH resource in the message 1.
In order to indicate to the base station the reference signal for which the beam failure occurs, the identity of the reference signal corresponds to the PRACH resource, and the UE may indicate the identity of the reference signal for the beam failure using the PRACH resource and/or the preamble sequence in Message 1(Message1, Msg1) in the beam failure recovery process.
For example, PRACH resource 1 corresponds to reference signal RS-1 and PRACH resource 2 corresponds to reference signal RS-2. When the reference signal RS-1 fails to generate a wave beam, the UE can send a preamble sequence through the PRACH resource 1, so that the base station can determine that the reference signal RS-1 fails to generate the wave beam according to the received time-frequency position of the PRACH resource 1; or the base station may determine that the beam failure of the reference signal RS-1 occurs according to the preamble sequence in the PRACH resource 1.
For example, PRACH resource 1 corresponds to reference signal RS-1, and PRACH resource 1 corresponds to reference signal RS-2. RS-1 and RS-2 correspond to different preamble sequences or sets of preamble sequences. If the reference signal RS-1 has beam failure, the UE can send a preamble sequence corresponding to the RS-1 through the PRACH resource 1, so that the base station can determine whether the reference signal RS-1 has beam failure or the reference signal RS-2 has beam failure according to the received time preamble sequence of the PRACH resource 1.
Optionally, the beam failure recovery method shown in fig. 1 may further include the steps of: when contention-based beam failure recovery or contention-free beam failure recovery is performed, indicating PRACH resources and/or preamble sequences corresponding to candidate reference signals by a message1, where signal quality of the candidate reference signals is greater than a preset threshold. Wherein, the signal quality can be RSRP, RSRQ or SINR.
In this embodiment, the UE may further notify the PRACH resource of the candidate reference signal to the base station through the message1, and the preset threshold may be obtained by the base station through high-level signaling configuration.
For example, PRACH resource 1 corresponds to reference signal { RS-1 }. And the reference signal RS-1 with the signal quality larger than a preset threshold is a candidate reference signal. Wherein, the signal quality can be RSRP or RSRQ or SINR.
For example, PRACH resource 2 corresponds to reference signal { RS-2, RS-3 }. And the reference signals RS-2 and RS-3 are candidate reference signals, wherein the signal quality of the reference signals RS-2 and RS-3 is greater than a preset threshold. Wherein, the signal quality can be RSRP or RSRQ or SINR.
For example, preamble sequence 1 corresponds to reference signal { RS-1 }. And the reference signals RS-1 and RS-4 are candidate reference signals, wherein the signal quality of the reference signals RS-1 and RS-4 is greater than a preset threshold. Wherein, the signal quality can be RSRP or RSRQ or SINR.
For example, preamble sequence 2 corresponds to reference signal { RS-2, RS-3 }. And the reference signals RS-2 and RS-3 are candidate reference signals, wherein the signal quality of the reference signals RS-2 and RS-3 is greater than a preset threshold. Wherein, the signal quality can be RSRP or RSRQ or SINR.
For example, preamble sequence 1 transmitted on PRACH resource 1 corresponds to reference signal { RS-1 }. And the reference signals RS-1 and RS-4 are candidate reference signals, wherein the signal quality of the reference signals RS-1 and RS-4 is greater than a preset threshold. Wherein, the signal quality can be RSRP or RSRQ or SINR.
For example, preamble sequence 2 transmitted on PRACH resource 2 corresponds to reference signals { RS-2, RS-3 }. And the reference signals RS-2 and RS-3 are candidate reference signals, wherein the signal quality of the reference signals RS-2 and RS-3 is greater than a preset threshold. Wherein, the signal quality can be RSRP or RSRQ or SINR.
In another embodiment of the present invention, referring to FIG. 2, it is determined whether the Multi-TRP/Multi-Panel mode is selected by one of the following steps:
step S201: determining to be in a Multi-TRP/Multi-Panel mode if a plurality of demodulation reference signal groups (DMRS groups) configured by the base station are received;
step S202: determining whether to enter a Multi-TRP/Multi-Panel mode or not through indication information in a PDCCH or indication information in RRC signaling;
step S203: determining, by a control element of a MAC layer, whether to activate or deactivate a Multi-TRP/Multi-Panel mode;
step S204: determining whether the mobile terminal is in a Multi-TRP/Multi-Panel mode through the configured measurement resource configuration for the listening beam failure or the reporting configuration for the listening beam failure;
step S205: judging whether a PDCCH scrambled by a wireless network temporary identifier aiming at a Multi-TRP/Multi-Panel mode is received or not to determine whether the PDCCH is in the Multi-TRP/Multi-Panel mode or not;
step S206: determining whether the downlink control information is in a Multi-TRP/Multi-Panel mode or not according to the format of the received downlink control information and the corresponding relation between each format and the Multi-TRP/Multi-Panel mode;
step S207: and determining that 2 code word layers are scheduled in the received downlink control information, and determining to be in a Multi-TRP/Multi-Panel mode when the sum of the two code word layers is less than or equal to 4.
In a specific implementation, the base station may configure 2 (Demodulation Reference Signal, DMRS) groups for the UE. Specifically, 2 DMRS groups may be configured in 1 DCI; or different DCIs may respectively schedule the respective PDSCHs; transmission Configuration Indication (TCI) states of different DCIs may be different.
The base station may also employ bit-carrying indication information in the PDCCH or RRC signaling to instruct the UE to enter Multi-TRP/Multi-Panel mode. For example, a 1bit is used to indicate that 0 represents Multi-TRP/Multi-Panel mode, or the indication default represents non-Multi-TRP/Multi-Panel mode; or 1 represents Multi-TRP/Multi-Panel mode, and 0 or the indication by default represents non-Multi-TRP/Multi-Panel mode.
The Multi-TRP/Multi-Panel mode may also be activated using MAC-CE. Correspondingly, the MAC-CE can also be used to deactivate the Multi-TRP/Multi-Panel mode. For example, 1bit is adopted to indicate that 0 represents that the Multi-TRP/Multi-Panel mode is activated, and 1 represents that the Multi-TRP/Multi-Panel mode is deactivated; or 1 represents activating the Multi-TRP/Multi-Panel mode and 0 represents deactivating the Multi-TRP/Multi-Panel mode. Wherein, the MAC-CE can also indicate whether each serving cell activates and deactivates the Multi-TRP/Multi-Panel mode; or the MAC-CE may indicate whether all serving cells activate and deactivate the Multi-TRP/Multi-Panel mode. In particular, an example of 2 MAC-CEs is given below,
TABLE 1
As shown in Table 1, the above tables C1, C2, … and C24 correspond to activation or deactivation of the Multi-TRP/Multi-Panel mode of the Scell. For example, setting C1 to 0 indicates activating a Multi-TRP/Multi-Panel mode of a serving cell with index of 1, and 1 indicates deactivating the Multi-TRP/Multi-Panel mode of the serving cell (or serving cell-1) with index of 1; or 1 represents the Multi-TRP/Multi-Panel mode of the serving cell with the activation index of 1, and 0 represents the Multi-TRP/Multi-Panel mode of the serving cell (or serving cell-1) with the deactivation index of 1. And so on, C2, C3, … and C24 correspond to different cells respectively. Wherein, R represents the reserved bit and is set to 0. Here, oct represents a byte composed of 8bits, oct 1 represents byte 1, oct 2 represents byte 2, oct 3 represents byte 3, and oct 4 represents byte 4.
TABLE 2
As shown in Table 2, C indicates activation or deactivation of the Multi-TRP/Multi-Panel mode. For example, setting C to be 0 indicates that the Multi-TRP/Multi-Panel mode is activated, and 1 indicates that the Multi-TRP/Multi-Panel mode is deactivated; or 1 represents activating the Multi-TRP/Multi-Panel mode and 0 represents deactivating the Multi-TRP/Multi-Panel mode. Wherein, R represents the reserved bit and is set to 0.
The UE may be explicitly or implicitly aware of being in Multi-TRP/Multi-Panel mode through the configured CSI measurement resource configuration or CSI report configuration.
Aiming at the Multi-TRP/Multi-Panel mode, a corresponding Radio Network Temporary Identity (RNTI) exists, and the UE receives the PDCCH scrambled by the RNTI and indicates that the UE enters the Multi-TRP/Multi-Panel mode.
Aiming at the Multi-TRP/Multi-Panel mode, a corresponding DCI format exists, and the UE receives the PDCCH corresponding to the DCI format and indicates that the UE enters the Multi-TRP/Multi-Panel mode.
The UE receives the DCI, wherein two code words (codes) are scheduled, but the sum of the layer numbers of the two code words is less than or equal to 4, and the UE enters a Multi-TRP/Multi-Panel mode.
It is understood that the UE may determine whether itself is in Multi-TRP/Multi-Panel mode by performing any one of steps S201 to S207. Meanwhile, the UE may also take any steps not limited to steps S201 to S207 to determine whether it is in Multi-TRP/Multi-Panel mode.
Referring to fig. 3, an embodiment of the present invention further discloses a beam failure recovery apparatus 30. The beam failure recovery apparatus 30 may be used for the user equipment side. The beam failure recovery apparatus 30 may include a reference signal set receiving module 301, a signal quality measurement module 302, and a beam failure recovery triggering module 303.
The reference signal set receiving module 301 is adapted to receive a reference signal set configured by a base station for a failure in listening to a beam, where the reference signal set for the failure in listening to the beam includes at least one reference signal;
the signal quality measurement module 302 is adapted to measure the signal quality of each reference signal and calculate an estimated block error rate of each reference signal according to the signal quality of each reference signal;
the beam failure recovery triggering module 303 is adapted to trigger a beam failure recovery procedure when a beam failure occurs in at least one reference signal in the reference signal set for monitoring the beam failure in the Multi-TRP/Multi-Panel mode, where the beam failure occurs in the reference signal refers to that a count of the estimated block error rate of the reference signal being higher than a preset threshold reaches a preset maximum value, and the preset maximum value is pre-configured by the base station.
In order to avoid a decoding failure condition caused by the fact that a base station does not know a beam state in a Multi-TRP/Multi-Panel mode, in the embodiment of the invention, when the count of the estimated block error rate of one or more reference signals higher than a preset threshold reaches a preset maximum value, the user equipment can trigger a beam failure recovery process, so that the base station configures a better beam to serve the user equipment, and the communication efficiency between the user equipment and the base station is ensured. In addition, the reference signal set for failure to listen to a beam may include more than two reference signals, the reference signals corresponding to the beam to meet the user's requirements in Multi-TRP/Multi-Panel mode.
For more details of the operation principle and the operation mode of the beam failure recovery apparatus 30, reference may be made to the relevant descriptions in fig. 1 to fig. 2, which are not described herein again.
The embodiment of the invention also discloses a storage medium, wherein computer instructions are stored on the storage medium, and when the computer instructions are operated, the steps of the method shown in the figure 1 or the figure 2 can be executed. The storage medium may include ROM, RAM, magnetic or optical disks, etc. The storage medium may further include a non-volatile memory (non-volatile) or a non-transitory memory (non-transient), and the like.
The embodiment of the invention also discloses user equipment which can comprise a memory and a processor, wherein the memory is stored with computer instructions capable of running on the processor. The processor, when executing the computer instructions, may perform the steps of the method shown in fig. 1 or fig. 2. The user equipment includes but is not limited to a mobile phone, a computer, a tablet computer and other terminal equipment.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. A method for beam failure recovery, comprising:
receiving a reference signal set for failure in beam listening configured by a base station, wherein the reference signal set for failure in beam listening comprises at least one reference signal;
measuring the signal quality of each reference signal, and calculating to obtain the estimated block error rate of each reference signal according to the signal quality of each reference signal;
and if the mobile terminal is in a Multi-TRP/Multi-Panel mode and at least one reference signal in the reference signal set for monitoring the beam failure has beam failure, triggering a beam failure recovery process, wherein the reference signal beam failure means that the count of the estimated block error rate of the reference signal higher than a preset threshold reaches a preset maximum value, and the preset maximum value is configured in advance by the base station.
2. The beam failure recovery method of claim 1, wherein the set of reference signals for listening beam failure comprises two reference signals, and wherein the triggering beam failure recovery procedure comprises:
and if the mobile terminal is in a Multi-TRP/Multi-Panel mode and any one of the reference signals in the reference signal set for monitoring the beam failure has the beam failure, triggering a beam failure recovery process.
3. The beam failure recovery method of claim 1, wherein the triggered beam failure recovery procedure comprises:
if the mobile terminal is in a Multi-TRP/Multi-Panel mode and all reference signals in the reference signal set for monitoring the beam failure have beam failure, directly triggering a beam failure recovery process, and otherwise reporting a beam report to a base station, wherein the beam report at least comprises the identifier of the reference signal with the beam failure.
4. The beam failure recovery method of claim 3, wherein the beam report further comprises one or more of: the cell identification corresponding to the reference signal with the beam failure, the signal quality of the reference signal with the beam failure, the identification of the optimal beam and the signal quality of the optimal beam.
5. The method of claim 1, wherein the set of reference signals for listening beam failure comprises three or four reference signals, and wherein the triggering beam failure recovery procedure comprises:
and if the mobile terminal is in a Multi-TRP/Multi-Panel mode and at least M reference signals in the reference signal set for monitoring the beam failure have beam failure, triggering a beam failure recovery process, wherein M is a positive integer greater than or equal to 2.
6. The beam failure recovery method according to claim 1, wherein the reference signal set for listening beam failure comprises a first subset and a second subset, and the first subset or the second subset comprises at most two reference signals, and the trigger beam failure recovery procedure comprises: and if the mobile terminal is in a Multi-TRP/Multi-Panel mode and all reference signals in the first subset and/or the second subset have beam failures, directly triggering a beam failure recovery process, wherein the first subset and the second subset respectively correspond to TRP or Panel.
7. The method according to claim 1, wherein if the Multi-TRP/Multi-Panel mode is adopted and at least one reference signal in the set of reference signals for listening to the beam failure has a beam failure, the triggering the beam failure recovery procedure comprises:
respectively adopting a beam failure frequency counter corresponding to each reference signal to count the frequency of the estimated block error rate of each reference signal higher than a preset threshold value;
and if the count of the beam failure frequency counter corresponding to at least one reference signal reaches the corresponding preset maximum value, triggering a beam failure recovery process.
8. The beam failure recovery method of claim 1, further comprising:
in performing contention-based beam failure recovery, the identity of the reference signal where the beam failure occurred is indicated by a control element of the MAC layer in message 3.
9. The beam failure recovery method of claim 1, further comprising:
when performing contention-based beam failure recovery or contention-free beam failure recovery, the identity of the reference signal for which the beam failure occurred is indicated by the PRACH resource in the message1, and the identity of the reference signal corresponds to the PRACH resource.
10. The beam failure recovery method of claim 1, further comprising:
when performing contention-based beam failure recovery or contention-free beam failure recovery, indicating PRACH resources corresponding to candidate reference signals by a message1, where signal quality of the candidate reference signals is greater than a preset threshold.
11. The beam failure recovery method of claim 1, wherein whether it is in Multi-TRP/Multi-Panel mode is determined by one of the following methods:
determining to be in a Multi-TRP/Multi-Panel mode if a plurality of demodulation reference signal groups configured by the base station are received;
determining whether to enter a Multi-TRP/Multi-Panel mode or not through indication information in a PDCCH or indication information in RRC signaling;
determining, by a control element of a MAC layer, whether a Multi-TRP/Multi-Panel mode is activated;
determining whether the mobile terminal is in a Multi-TRP/Multi-Panel mode through the configured measurement resource configuration for the listening beam failure or the reporting configuration for the listening beam failure;
judging whether a PDCCH scrambled by a wireless network temporary identifier aiming at a Multi-TRP/Multi-Panel mode is received or not to determine whether the PDCCH is in the Multi-TRP/Multi-Panel mode or not;
determining whether the downlink control information is in a Multi-TRP/Multi-Panel mode or not according to the format of the received downlink control information and the corresponding relation between each format and the Multi-TRP/Multi-Panel mode;
and determining the sum of the number of layers of the scheduled code words in the received downlink control information, and determining to be in a Multi-TRP/Multi-Panel mode when the sum of the number of layers is less than or equal to 4.
12. A beam failure recovery apparatus, comprising:
a reference signal set receiving module, adapted to receive a reference signal set configured by a base station for a listening beam failure, where the reference signal set for the listening beam failure includes at least one reference signal;
the signal quality measurement module is suitable for measuring the signal quality of each reference signal and calculating to obtain the estimated block error rate of each reference signal according to the signal quality of each reference signal;
the beam failure recovery triggering module is adapted to trigger a beam failure recovery process when a beam failure occurs in at least one reference signal in the reference signal set for monitoring the beam failure in a Multi-TRP/Multi-Panel mode, where the beam failure occurs in the reference signal refers to a count that an estimated block error rate of the reference signal is higher than a preset threshold and reaches a preset maximum value, and the preset maximum value is pre-configured by the base station.
13. A storage medium having stored thereon computer instructions which, when executed, perform the steps of the beam failure recovery method of any one of claims 1 to 11.
14. A user equipment comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the beam failure recovery method of any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811070259.8A CN110896546B (en) | 2018-09-13 | 2018-09-13 | Beam failure recovery method and device, storage medium and user equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811070259.8A CN110896546B (en) | 2018-09-13 | 2018-09-13 | Beam failure recovery method and device, storage medium and user equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110896546A true CN110896546A (en) | 2020-03-20 |
| CN110896546B CN110896546B (en) | 2022-04-22 |
Family
ID=69785681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811070259.8A Active CN110896546B (en) | 2018-09-13 | 2018-09-13 | Beam failure recovery method and device, storage medium and user equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110896546B (en) |
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112119597A (en) * | 2020-08-21 | 2020-12-22 | 北京小米移动软件有限公司 | Beam failure determination method, device, equipment and storage medium |
| WO2020253880A1 (en) * | 2019-06-21 | 2020-12-24 | 中国移动通信有限公司研究院 | Beam switching method and apparatus, and communication device |
| CN112805957A (en) * | 2020-12-31 | 2021-05-14 | 北京小米移动软件有限公司 | Resource set configuration method, device and storage medium |
| CN113170343A (en) * | 2021-03-05 | 2021-07-23 | 北京小米移动软件有限公司 | Beam failure detection method, beam failure detection device, and storage medium |
| WO2021204058A1 (en) * | 2020-04-07 | 2021-10-14 | 维沃移动通信有限公司 | Reference signal measurement method and terminal device |
| CN113545122A (en) * | 2021-06-11 | 2021-10-22 | 北京小米移动软件有限公司 | Beam failure recovery method, device and storage medium |
| US20210351834A1 (en) * | 2019-01-25 | 2021-11-11 | Vivo Mobile Communication Co., Ltd. | Method for beam failure recovery, method for beam failure handling, terminal, and network-side device |
| WO2021253952A1 (en) * | 2020-06-19 | 2021-12-23 | 北京紫光展锐通信技术有限公司 | Resource updating method and apparatus |
| WO2021259371A1 (en) * | 2020-06-24 | 2021-12-30 | FG Innovation Company Limited | Method and user equipment for wireless communication in wireless communication system |
| EP3952134A1 (en) * | 2020-08-05 | 2022-02-09 | ACER Incorporated | User equipment for beam failure detection and beam failure detection method |
| WO2022027475A1 (en) * | 2020-08-06 | 2022-02-10 | Nec Corporation | Method, device and computer readable medium of communication |
| CN114258054A (en) * | 2020-09-25 | 2022-03-29 | 展讯通信（上海）有限公司 | Method and device for determining transmission receiving point |
| WO2022067706A1 (en) * | 2020-09-30 | 2022-04-07 | Lenovo (Beijing) Limited | Method and apparatus for beam failure recovery in multi-dci based multiple trps |
| CN114374994A (en) * | 2020-10-14 | 2022-04-19 | 中国移动通信有限公司研究院 | Method for reporting and receiving beam failure information, terminal and network equipment |
| WO2022083510A1 (en) * | 2020-10-22 | 2022-04-28 | 索尼集团公司 | Electronic device, wireless communication method, and non-transitory computer-readable storage medium |
| WO2022083637A1 (en) * | 2020-10-23 | 2022-04-28 | 维沃移动通信有限公司 | Beam failure recovery method and device, terminal, and storage medium |
| WO2022088012A1 (en) * | 2020-10-30 | 2022-05-05 | Qualcomm Incorporated | Beam failure recovery medium access control signaling for multi transmit-receive point system |
| CN114513804A (en) * | 2020-11-16 | 2022-05-17 | 上海朗帛通信技术有限公司 | Method and device used in node of wireless communication |
| WO2022151109A1 (en) * | 2021-01-13 | 2022-07-21 | 富士通株式会社 | Beam failure detecting method and apparatus |
| WO2022206845A1 (en) * | 2021-04-01 | 2022-10-06 | 华为技术有限公司 | Beam failure recovery method and apparatus, and readable storage medium |
| WO2022217552A1 (en) * | 2021-04-15 | 2022-10-20 | 深圳传音控股股份有限公司 | Panel state processing method, communication device, and storage medium |
| WO2023025013A1 (en) * | 2021-08-24 | 2023-03-02 | 上海朗帛通信技术有限公司 | Method and device for wireless communication |
| WO2023050263A1 (en) * | 2021-09-30 | 2023-04-06 | Qualcomm Incorporated | Per-transmission and reception point (trp) beam failure reporting |
| WO2023066214A1 (en) * | 2021-10-20 | 2023-04-27 | 华为技术有限公司 | Beam failure recovery method and communication apparatus |
| WO2023065213A1 (en) * | 2021-10-21 | 2023-04-27 | Oppo广东移动通信有限公司 | Beam failure recovery method and apparatus, and terminal device |
| CN116388810A (en) * | 2020-11-26 | 2023-07-04 | 上海朗帛通信技术有限公司 | Method and apparatus in a communication node for wireless communication |
| CN116388810B (en) * | 2020-11-26 | 2024-11-12 | 上海朗帛通信技术有限公司 | Method and apparatus in a communication node for wireless communication |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107567038A (en) * | 2016-07-01 | 2018-01-09 | 华硕电脑股份有限公司 | The method and apparatus that management communicates when served beams are invalid in radio communication |
| WO2018141303A1 (en) * | 2017-02-06 | 2018-08-09 | Mediatek Inc. | Beam failure recovery mechanism for multi-beam operation |
| WO2018143776A1 (en) * | 2017-02-06 | 2018-08-09 | 엘지전자 주식회사 | Method for monitoring wireless link by terminal in wireless communication system and device for supporting same |
-
2018
- 2018-09-13 CN CN201811070259.8A patent/CN110896546B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107567038A (en) * | 2016-07-01 | 2018-01-09 | 华硕电脑股份有限公司 | The method and apparatus that management communicates when served beams are invalid in radio communication |
| WO2018141303A1 (en) * | 2017-02-06 | 2018-08-09 | Mediatek Inc. | Beam failure recovery mechanism for multi-beam operation |
| WO2018143776A1 (en) * | 2017-02-06 | 2018-08-09 | 엘지전자 주식회사 | Method for monitoring wireless link by terminal in wireless communication system and device for supporting same |
| US20180227899A1 (en) * | 2017-02-06 | 2018-08-09 | Mediatek Inc. | Beam Failure Recovery Mechanism for Multi-Beam Operation |
Non-Patent Citations (3)
| Title |
|---|
| AT&T: ""R1-1716169 Beam Recovery for Partial and Full Control Channel Failure"", 《3GPP TSG_RAN\WG1_RL1》 * |
| ERICSSON: ""R1-1800700 Remaining details and corrections on beam recovery"", 《3GPP TSG_RAN\WG1_RL1》 * |
| HUAWEI, HISILICON: "Solution and TP for multi-TRP PDCCH transmission", 《3GPP TSG RAN WG1 AD HOC MEETING，R1-1800824》 * |
Cited By (43)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210351834A1 (en) * | 2019-01-25 | 2021-11-11 | Vivo Mobile Communication Co., Ltd. | Method for beam failure recovery, method for beam failure handling, terminal, and network-side device |
| WO2020253880A1 (en) * | 2019-06-21 | 2020-12-24 | 中国移动通信有限公司研究院 | Beam switching method and apparatus, and communication device |
| WO2021204058A1 (en) * | 2020-04-07 | 2021-10-14 | 维沃移动通信有限公司 | Reference signal measurement method and terminal device |
| WO2021253952A1 (en) * | 2020-06-19 | 2021-12-23 | 北京紫光展锐通信技术有限公司 | Resource updating method and apparatus |
| WO2021259371A1 (en) * | 2020-06-24 | 2021-12-30 | FG Innovation Company Limited | Method and user equipment for wireless communication in wireless communication system |
| US11791888B2 (en) | 2020-06-24 | 2023-10-17 | FG Innovation Company Limited | Method and user equipment for wireless communication in wireless communication system |
| US11950112B2 (en) | 2020-08-05 | 2024-04-02 | Acer Incorporated | User equipment for beam failure detection and beam failure detection method |
| CN114071542B (en) * | 2020-08-05 | 2023-10-13 | 宏碁股份有限公司 | User equipment for beam fault detection and beam fault detection method |
| KR102661569B1 (en) * | 2020-08-05 | 2024-04-26 | 에이서 인코포레이티드 | User equipment for beam failure detection and beam failure detection method |
| EP3952134A1 (en) * | 2020-08-05 | 2022-02-09 | ACER Incorporated | User equipment for beam failure detection and beam failure detection method |
| AU2021212031B2 (en) * | 2020-08-05 | 2022-09-08 | Acer Incorporated | User equipment for beam failure detection and beam failure detection method |
| KR20220017861A (en) * | 2020-08-05 | 2022-02-14 | 에이서 인코포레이티드 | User equipment for beam failure detection and beam failure detection method |
| CN114071542A (en) * | 2020-08-05 | 2022-02-18 | 宏碁股份有限公司 | User equipment for beam fault detection and beam fault detection method |
| WO2022027475A1 (en) * | 2020-08-06 | 2022-02-10 | Nec Corporation | Method, device and computer readable medium of communication |
| CN115378485A (en) * | 2020-08-21 | 2022-11-22 | 北京小米移动软件有限公司 | Beam failure determination method, device, equipment and storage medium |
| CN112119597A (en) * | 2020-08-21 | 2020-12-22 | 北京小米移动软件有限公司 | Beam failure determination method, device, equipment and storage medium |
| CN114258054A (en) * | 2020-09-25 | 2022-03-29 | 展讯通信（上海）有限公司 | Method and device for determining transmission receiving point |
| WO2022067706A1 (en) * | 2020-09-30 | 2022-04-07 | Lenovo (Beijing) Limited | Method and apparatus for beam failure recovery in multi-dci based multiple trps |
| CN114374994A (en) * | 2020-10-14 | 2022-04-19 | 中国移动通信有限公司研究院 | Method for reporting and receiving beam failure information, terminal and network equipment |
| WO2022078320A1 (en) * | 2020-10-14 | 2022-04-21 | 中国移动通信有限公司研究院 | Beam failure information reporting and receiving methods, terminal, and network device |
| WO2022083510A1 (en) * | 2020-10-22 | 2022-04-28 | 索尼集团公司 | Electronic device, wireless communication method, and non-transitory computer-readable storage medium |
| CN114499782A (en) * | 2020-10-23 | 2022-05-13 | 维沃移动通信有限公司 | Beam failure recovery method, device, terminal and storage medium |
| EP4236152A4 (en) * | 2020-10-23 | 2024-07-17 | Vivo Mobile Communication Co Ltd | Beam failure recovery method and device, terminal, and storage medium |
| WO2022083637A1 (en) * | 2020-10-23 | 2022-04-28 | 维沃移动通信有限公司 | Beam failure recovery method and device, terminal, and storage medium |
| CN116530129A (en) * | 2020-10-30 | 2023-08-01 | 高通股份有限公司 | Beam failure recovery medium access control signaling for multiple transmit-receive point systems |
| WO2022088012A1 (en) * | 2020-10-30 | 2022-05-05 | Qualcomm Incorporated | Beam failure recovery medium access control signaling for multi transmit-receive point system |
| WO2022100639A1 (en) * | 2020-11-16 | 2022-05-19 | 上海朗帛通信技术有限公司 | Method and apparatus used in node for wireless communication |
| CN114513804A (en) * | 2020-11-16 | 2022-05-17 | 上海朗帛通信技术有限公司 | Method and device used in node of wireless communication |
| CN116388810A (en) * | 2020-11-26 | 2023-07-04 | 上海朗帛通信技术有限公司 | Method and apparatus in a communication node for wireless communication |
| CN116388810B (en) * | 2020-11-26 | 2024-11-12 | 上海朗帛通信技术有限公司 | Method and apparatus in a communication node for wireless communication |
| CN112805957A (en) * | 2020-12-31 | 2021-05-14 | 北京小米移动软件有限公司 | Resource set configuration method, device and storage medium |
| WO2022151109A1 (en) * | 2021-01-13 | 2022-07-21 | 富士通株式会社 | Beam failure detecting method and apparatus |
| CN113170343A (en) * | 2021-03-05 | 2021-07-23 | 北京小米移动软件有限公司 | Beam failure detection method, beam failure detection device, and storage medium |
| CN113170343B (en) * | 2021-03-05 | 2023-09-19 | 北京小米移动软件有限公司 | Beam failure detection method, beam failure detection device, and storage medium |
| WO2022206845A1 (en) * | 2021-04-01 | 2022-10-06 | 华为技术有限公司 | Beam failure recovery method and apparatus, and readable storage medium |
| WO2022217552A1 (en) * | 2021-04-15 | 2022-10-20 | 深圳传音控股股份有限公司 | Panel state processing method, communication device, and storage medium |
| CN113545122A (en) * | 2021-06-11 | 2021-10-22 | 北京小米移动软件有限公司 | Beam failure recovery method, device and storage medium |
| CN113545122B (en) * | 2021-06-11 | 2024-04-02 | 北京小米移动软件有限公司 | Beam failure recovery method, device and storage medium |
| WO2022257136A1 (en) * | 2021-06-11 | 2022-12-15 | 北京小米移动软件有限公司 | Beam failure recovery method and apparatus and storage medium |
| WO2023025013A1 (en) * | 2021-08-24 | 2023-03-02 | 上海朗帛通信技术有限公司 | Method and device for wireless communication |
| WO2023050263A1 (en) * | 2021-09-30 | 2023-04-06 | Qualcomm Incorporated | Per-transmission and reception point (trp) beam failure reporting |
| WO2023066214A1 (en) * | 2021-10-20 | 2023-04-27 | 华为技术有限公司 | Beam failure recovery method and communication apparatus |
| WO2023065213A1 (en) * | 2021-10-21 | 2023-04-27 | Oppo广东移动通信有限公司 | Beam failure recovery method and apparatus, and terminal device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110896546B (en) | 2022-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110896546B (en) | Beam failure recovery method and device, storage medium and user equipment | |
| US11985663B2 (en) | Control channel transmission method and apparatus, and communications node | |
| US11258502B2 (en) | Communications method and apparatus for beam failure recovery of multiple serving cells | |
| JP7308932B2 (en) | Beam failure recovery for serving cells | |
| CN110537392B (en) | Method for performing random access procedure and apparatus therefor | |
| CN111034302B (en) | Method and apparatus for random access for beam failure recovery | |
| CN114268989B (en) | Wireless communication method, apparatus and computer readable medium | |
| US9742532B2 (en) | Method, system and device for using terminal identifier | |
| JP2021521750A (en) | Secondary cell beam recovery | |
| EP4135390A1 (en) | Measurement method and apparatus, node, and storage medium | |
| EP3751881A1 (en) | Beam management method, terminal, network device, and storage medium | |
| US20170367070A1 (en) | Method and Device for Sending Downlink Information | |
| KR20190049951A (en) | Low latency physical uplink control channel with scheduling request and channel state information | |
| KR20170109569A (en) | Method for transmitting an uplink signal, user equipment and base station | |
| US20090191883A1 (en) | Method and device for transmitting data | |
| JP7459217B2 (en) | Link recovery in wireless communications | |
| CN116156546A (en) | Method and system for measurement reporting for network maintenance | |
| EP4193772B1 (en) | Coverage enhancement of msg3 and msga transmissions on physical uplink shared channel | |
| EP3761694B1 (en) | Data transmission method and device | |
| US20230262820A1 (en) | Beam failure recovery method and apparatus, terminal, and storage medium | |
| US9769845B2 (en) | Method for group scheduling grant, user equipment and radio network controller | |
| CN111742579A (en) | Method for executing beam failure recovery process and user device | |
| JP2020508001A (en) | Random access preamble selection from multiple types of preamble groups | |
| CN107852232B (en) | Communication device, method and storage medium | |
| EP3454488A1 (en) | Method and device for monitoring control channel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Hualei Inventor before: Zhang Meng Inventor before: Wang Hualei |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |